Later on the show, "Tonight's" LA set was transformed into Bayside High School, where "new student" Jimmy Fallon chatted with buddies Zack Morris, A.C. Slater, Jessie Spano, Kelly Kapowski and principal Mr. Belding, all played by the original actors.

With a number of allusions and inside jokes about the actors and characters — it's a must-watch for any true "Saved by the Bell" fan.